Returns the result of applying $f to this $option's value if this $option is nonempty. Returns $none if this $option is empty. Slightly different from map in that $f is expected to return an $option (which could be $none).

flatten

fun <A> Option<Option<A>>.flatten(): Option<A>

fold

inline fun <R> fold(ifEmpty: () -> R, ifSome: (Nothing) -> R): R

getOrElse

inline fun <T> Option<T>.getOrElse(default: () -> T): T

Returns the option's value if the option is nonempty, otherwise return the result of evaluating default.

getOrNull

fun getOrNull(): Nothing?

Returns the encapsulated value A if this instance represents Some or null if it is None.

isNone

fun isNone(): Boolean

Returns true if the option is None, false otherwise.

isSome

fun isSome(): Boolean

Returns true if the option is Some, false otherwise.

inline fun isSome(predicate: (Nothing) -> Boolean): Boolean

Returns true if this option is nonempty '''and''' the predicate $p returns true when applied to this $option's value. Otherwise, returns false.

map

inline fun map(f: (Nothing) -> B): Option

Returns a Some<$B> containing the result of applying $f to this $option's value if this $option is nonempty. Otherwise return $none.

onNone

inline fun onNone(action: () -> Unit): Option<Nothing>

The given function is applied as a fire and forget effect if this is a None. When applied the result is ignored and the original None value is returned

onSome

inline fun onSome(action: (Nothing) -> Unit): Option<Nothing>

The given function is applied as a fire and forget effect if this is a some. When applied the result is ignored and the original Some value is returned

recover

inline fun <A> Option<A>.recover(recover: OptionRaise.(None) -> A): Option<A>

Recover from any None if encountered.

toEither

inline fun <L> toEither(ifEmpty: () -> L): Either<L, Nothing>

toList

fun toList(): List<Nothing>

toMap

fun <K, V> Option<Pair<K, V>>.toMap(): Map<K, V>

toString

open override fun toString(): String